skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: THE H-3 IRRADIATION EXPERIMENT: IRRADIATION OF EGCR GRAPHITE. Interim Report No. 1

Abstract

Electric Co. Hanford Atomic Products Operation, RichIrradiation experiments are being performed in the GETR to determine the long-term stability of EGCR graphite. The results of two experiments with a peak total exposure equivalent to 38,000 MWD/AT in the EGCR are available. This is approximately one half the expected lifetime exposure of the EGCR. The H-3-l and H-3-2 capsules contained samples of EGCR graphite and reference CSF graphite. Both capsules were identical and were irradiated sequentially to increasc the dose on the samples. Sixty per cent of the samples irradiated in the H-3-l capsulc were reirradiated in the H-3-2 capsule. The capsule design utilized the gamma heating of the GETR E-7 facility to achieve desired operating temperatures. The temperatures on inter- and intra-cycle irradiation were constant within 25 f C. Samples were irradiated in a temperature range of 475 to 850 f C. The graphite tested was obtained from a fullsize cross section of an EGCR block. Irradiation results did not indicate differences in contraction of parallel samples chosen at several positions within the block. Contraction rates of the graphites tested were found to depend on the temperature of irradiation. Estimates of the contraction rates of parallel samples of EGCR graphitemore » are 0.l5% per l0/sup 21/ nvt at 575 f C and 0.19% per 10/sup 21/ nvt at 475 f C. Parallel samples contracted at a higher rate than the transverse samples. The observed length changes are presented as a function of exposure. (auth)« less

Authors:
;
Publication Date:
Research Org.:
General Electric Co. Hanford Atomic Products Operation, Richland, Wash.
Sponsoring Org.:
USDOE
OSTI Identifier:
4820123
Report Number(s):
HW-71500-A
NSA Number:
NSA-16-006786
DOE Contract Number:  
AT(45-1)-1350
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-62
Country of Publication:
United States
Language:
English
Subject:
METALS, CERAMICS, AND OTHER MATERIALS; ANISOTROPY; CAPSULES; EXPANSION; GAMMA RADIATION; GETR; GRAPHITE; GRAPHITE CSF; HEATING; HIGH TEMPERATURE; IRRADIATION; MATERIALS TESTING; RADIATION DOSES; RADIATION EFFECTS; REACTORS; TEMPERATURE; VARIATIONS; VOLUME

Citation Formats

Davidson, J.M., and Helm, J.W. THE H-3 IRRADIATION EXPERIMENT: IRRADIATION OF EGCR GRAPHITE. Interim Report No. 1. United States: N. p., 1961. Web. doi:10.2172/4820123.
Davidson, J.M., & Helm, J.W. THE H-3 IRRADIATION EXPERIMENT: IRRADIATION OF EGCR GRAPHITE. Interim Report No. 1. United States. doi:10.2172/4820123.
Davidson, J.M., and Helm, J.W. Mon . "THE H-3 IRRADIATION EXPERIMENT: IRRADIATION OF EGCR GRAPHITE. Interim Report No. 1". United States. doi:10.2172/4820123. https://www.osti.gov/servlets/purl/4820123.
@article{osti_4820123,
title = {THE H-3 IRRADIATION EXPERIMENT: IRRADIATION OF EGCR GRAPHITE. Interim Report No. 1},
author = {Davidson, J.M. and Helm, J.W.},
abstractNote = {Electric Co. Hanford Atomic Products Operation, RichIrradiation experiments are being performed in the GETR to determine the long-term stability of EGCR graphite. The results of two experiments with a peak total exposure equivalent to 38,000 MWD/AT in the EGCR are available. This is approximately one half the expected lifetime exposure of the EGCR. The H-3-l and H-3-2 capsules contained samples of EGCR graphite and reference CSF graphite. Both capsules were identical and were irradiated sequentially to increasc the dose on the samples. Sixty per cent of the samples irradiated in the H-3-l capsulc were reirradiated in the H-3-2 capsule. The capsule design utilized the gamma heating of the GETR E-7 facility to achieve desired operating temperatures. The temperatures on inter- and intra-cycle irradiation were constant within 25 f C. Samples were irradiated in a temperature range of 475 to 850 f C. The graphite tested was obtained from a fullsize cross section of an EGCR block. Irradiation results did not indicate differences in contraction of parallel samples chosen at several positions within the block. Contraction rates of the graphites tested were found to depend on the temperature of irradiation. Estimates of the contraction rates of parallel samples of EGCR graphite are 0.l5% per l0/sup 21/ nvt at 575 f C and 0.19% per 10/sup 21/ nvt at 475 f C. Parallel samples contracted at a higher rate than the transverse samples. The observed length changes are presented as a function of exposure. (auth)},
doi = {10.2172/4820123},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1961},
month = {10}
}